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RE: [Zope] Running ZopeHTTPServer and PCGI together = a bad thing ?
by Michel Pelletier 07 Jun '99

07 Jun '99

> -----Original Message----- > From: Jim Fulton [mailto:jim@digicool.com] > Sent: Friday, June 04, 1999 6:40 PM > To: Michel Pelletier > Cc: 'Tony McDonald'; Zope List > Subject: Re: [Zope] Running ZopeHTTPServer and PCGI together = a bad > thing? > > > > > Michel Pelletier wrote: > > > (snip) > > > A wafer-thin CGI program is forked for every request, this > is used to > > connect up Apache and the Zope long running process. So yes, this > > expensive fork happens for every request. > > It's not *that* expensive. This is a very thin wrapper. > > > It's no different, however, then other CGI overhead. > > It's reallu much lower than typical CGI overhead. Most CGI > scripts are written using interpreters (e.g. sh, perl, Python). > Cranking up an interpreter is much more expensive than cranking up > the pcgi_wrapper. > I was sort of thinking about before the actual exec'ing of the CGI program, whether it be fast compiled C or the more common monstrosity of an interpreter (and I don't mean Python either). > > One of these days, someone is going to write a > > mod_pcgi module for Apache, and take that expensive fork > out. For light > > loads, it's really not noticeable, but for heavy loads, one fork per > > request gets heavy. > > I think a site could sustain a million hits a day using pcgi > on moderately > fast hardware. I agree, a million forks per day is not a heavy load, but I bet it's fairly measureable. Tack onto that the need for apache to pre-fork and re-fork servers all the time, and you could hit a pretty hard limit, but I am talking with no actual numbers here, I do seem to remember somewhere statistics on the number of milliseconds a fork took on various platforms and hardware... hmm, where did that go? For linux I seem to remember it being somwhere on the order of 100 or so milliseconds, (I'm reaching) on something like a 486 66mhz machine. > > > ZServer is noticably faster in this regard than > > Apache. > > True. An an apache module would definately be a good thing. > Yes, I am curious to see how many milliseconds could be taken off the request round trip time by taking thw whole fork exec cycle out of the request loop? It would probably come into speed with ZServer (if there are enough apaches preforked) since the mechanism at that point is the same, a select() loop. At this point apache's need to context switch would probably even out with ZServer's interpreter overhead, but once again, what the hell do I know? > BTW, ZServer supports PCGI, so you *can* use Apache+PCGI+ZServer. > This is useful, for example, if you want to use Apache to do SSL > while using ZServer for other HTTP requests and FTP. Another beauty of apache is that it's got GOBS of little gizmos and knobs on it. And the real workd security issues have been though about by thousands of more experts for apache than ZServer. A double ended light saber no doubt, but I'm sure Darth Fulton could find something to do with them. ;) -Michel > > Jim > > -- > Jim Fulton mailto:jim@digicool.com Python Powered! > Technical Director (888) 344-4332 http://www.python.org > Digital Creations http://www.digicool.com http://www.zope.org > > Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email > address may not be added to any commercial mail list with out my > permission. Violation of my privacy with advertising or SPAM will > result in a suit for a MINIMUM of $500 damages/incident, $1500 for > repeats. > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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autoincrementing in a folder
by Alex Rice 07 Jun '99

07 Jun '99

Does there exist any methods in Zope to keep an auto_increment id on a Folder? I have written an external method for doing this. Do people often use this idiom in zope, or am I still thinking in terms of SQL? :-) Alex Rice | alrice(a)swcp.com | http://www.swcp.com/~alrice Current Location: N. Rio Grande Bioregion, Southwestern USA

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On the previous GIF Anim
by zhaoway 06 Jun '99

06 Jun '99

Hi! On the previous GIF animations for the PT: It's really a pain for me to go through those GIF animations. Not too many reasons, just the speed is far too slow and the telephone fee is far too expensive and the browser always behaves strangely. I'd rather you have some GIF frames been picked out to be shown there in the web site then I could go through them myself. Maybe JPEG could give better compresion ratios. --zhaoway .________________________________ /http://mud.jlonline.com/~zhaoway\ 闷罐船 \zhaoway(a)public1.ptt.js.cn / 水世界 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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eval() in dtml?
by Alex Rice 06 Jun '99

06 Jun '99

Is eval() not available in DTML? What am I doing wrong here? You can probably tell I'm new this  Create a new Folder, then a Doc in the new Folder. folderName and text are string which are submitted to this script.    Alex Rice | alrice(a)swcp.com | http://www.swcp.com/~alrice Current Location: N. Rio Grande Bioregion, Southwestern USA

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Example Setup for Gadfly doesn´t work with 2.0.0a1 2.0.0a1
by Joachim Schmitz 06 Jun '99

06 Jun '99

Hi, I trying to make the "Example Setup for Gadfly" from the HOW-To section work. I created a document with the DTML source, when viewing it the following error occurs.  Wher can I find a detailed description of the "manage_addZGadflyConnection" and other functions. regards Joachim Schmitz ------------------------------------------------------------------------------ P R O F I . N E T A G * Joachim Schmitz * Senior Network Consultant ------------------------------------------------------------------------------ profi.net | Aindlinger Str. 7 | Voice +49 821 27062-0 Hassler & Mair AG | 86167 Augsburg | Fax +49 821 27062-99 | Germany | Email js(a)profi.net

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Problems with adding a DTML-document
by Stefan Thull 06 Jun '99

06 Jun '99

Hello I have installed Zope 1.10.2 ; Python 1.5.1 and use it with apache on a debian-linux system. I managed to compile it, make it work with apache, but I fail to add a DTML-document. That means I have the main manage-screen, I can add folders but no documents, methods or images. I also can change existing documents, but I can not add a document. After a long time of loading (4-5 min) the server says: "document contains no data" The same error appeared as I tried it with Zope (as downloaded bynary)and Zap as Webserver. So I think, it is not an error in the compilation but something missing in my system. Perhaps a variable which must be set??? Where could be the missing link? Thank you for any help Stefan Thull

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Zope on MacOS 8.6
by Pieter Claerhout 06 Jun '99

06 Jun '99

Hello, Is there anyone who got Zope running under the MacOS (not MacOS X)? If so, is it hard to get it working? Can you provide some instructions?? Thanks, Pieter [ Pieter Claerhout chill(a)mediaport.org ]

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sql methods
by Graham Chiu 06 Jun '99

06 Jun '99

I would like to create a session variable and store it in a table. I created a sqlmethod as follows: id: active_sessions arguments: sessionid select * from session where  which works fine when tested. I have called it like this:  Your sessionid is <br>  No sessionid <br>    Yes, this session id is logged<br>  Need to add this session id<br>   but nothing gets printed between the #in #/in tags. ------- Regards, Graham Chiu gchiu<at>compkarori.co.nz

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RE: [Zope] A single value from SQL
by Rob Page 05 Jun '99

05 Jun '99

> Right. Essentially I want to treat the SQL method like a function call > which returns a value and not a list. Two points... First, all SQLMethods return lists. This eliminates the need to test if the result from a ZSQLMethod is a value or a list in DTML every single time you use a ZSQLMethod object -- this is a Win. Of course, your point about wanting to cleanly get at what you know to be a single row (e.g., SELECT MAX) is a very common one. I'll poke around and see what I see -- IMO, you and Oleg are right, there should be (probably is) a way to grab the data directly. --Rob

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RE: error in docs
by Rob Page 05 Jun '99

05 Jun '99

Daniel: > There's an error at > http://www.zope.org/Documentation/Guides/ZSQL/ZSQL-HTML/ZSQL.h > tml#pgfId-930972 > > that is confusing: Thanks for the report! I've added to the Zope Comunity's Bug Collector at: http://www.zope.org/Collector/299/view I suspect that the change will be incorporated into a near-future version of the document. Our main source of bugs (software and docs) is the Collector. Any time yo find something that isn't just right, please get it into the Collector so it has good visibility! Tks, --Rob

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